CN106626568B - A kind of protective film and preparation method thereof being bonded cambered surface edge - Google Patents
A kind of protective film and preparation method thereof being bonded cambered surface edge Download PDFInfo
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/04—Interconnection of layers
- B32B7/06—Interconnection of layers permitting easy separation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B25/00—Layered products comprising a layer of natural or synthetic rubber
- B32B25/20—Layered products comprising a layer of natural or synthetic rubber comprising silicone rubber
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/40—Layered products comprising a layer of synthetic resin comprising polyurethanes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B33/00—Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/02—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by a sequence of laminating steps, e.g. by adding new layers at consecutive laminating stations
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B38/00—Ancillary operations in connection with laminating processes
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Abstract
The present invention discloses a kind of protective film and preparation method thereof that can be bonded cambered surface edge, and the protective film is layer structure, including the first PET release film layer, coatings, TPU layer, OCA layers, the pet layer, layer of silica gel, the 2nd PET release film layer stacked gradually.The protective film has many advantages, such as that reconditioning layer adhesive force is good, compact dimensions are accurate, it is fast to repair speed, cambered surface edge stabilization does not rebound.
Description
Technical field
The present invention relates to a kind of protective film of electronic product fields, and in particular to one kind can be bonded cambered surface edge protective film and
Preparation method.
Background technique
2.5D curved surface mobile phone and 3D curved surface mobile phone generality are higher and higher, from 2015 to 2016 in the flagship machine of year publication
It is found that cambered surface mobile phone occupation rate is close to 90%；And can determine whether from the data and some information increased, curved surface mobile phone is
The development trend of megatrend, occupation rate of market can still continue to increase.
In order to cope with curved surface mobile phone, safeguard film for cellular phone also developed in succession TPU+ acrylic pad pasting, hot bending PET pad pasting,
Hot bending tempered glass pad pasting；But the problem of pasting curved surface mobile phone also nonetheless, can be solved perfectly without any a product；Such as
(1) TPU+ acrylic bond paper facing: TPU material belongs to mantle series, whole flexible, partially soft, causes entirety not straight and upright enough, causes to paste
Inaccuracy is aligned during film, pad pasting gimmick requires high；Since using high viscous 200g acrylic colloidality, glue-line can not be arranged normally
Gas need to influence pad pasting experience property by corresponding swipe auxiliary exhaust；(2) hot bending PET pad pasting: the product mainly use PET for
Substrate, toughness is poor, and thermoplasticity is big, therefore hot-forming rebound after cooling is larger；(3) hot bending tempered glass pad pasting: it is at high cost,
Edge is easily broken, can not do full absorption, and touch-control is insensitive
Summary of the invention
For overcome the deficiencies in the prior art, in order to solve protective film fitting curved surface mobile phone stability it is poor, experience property is poor,
The problems such as functional difference；In order to preferably adapt to the development trend of curved surface mobile phone, provided for curved surface mobile phone more stable, effective
Protection, the first purpose of this invention are to provide kind of the protective film that can be bonded cambered surface edge, the protective film.The protective film has
Reconditioning layer adhesive force is good, compact dimensions are accurate, repairing speed, fast, cambered surface edge stablizes the advantages that not rebounding.
Second object of the present invention is to provide for a kind of preparation method of said protection film.
Achieving the object of the present invention can be reached by adopting the following technical scheme that:
A kind of protective film being bonded cambered surface edge, the protective film is layer structure, including the first PET stacked gradually
Release film layer, coatings, TPU layer, OCA layers, pet layer, layer of silica gel, the 2nd PET release film layer.First PET release film,
It is surface and the glue surface of product that two PET release film masters are to be protected, is torn again during client's pad pasting
Preferably, the first PET release film layer is far from being also covered with the first PE layers in the one side of coatings.It is preferred that
Ground, the 2nd PET release film layer is far from being also covered with the 2nd PE layers in the one side of layer of silica gel.First PE layers, the 2nd PE
Layer is high temperature resistant PE film, is removed after the hot pressing is completed；PE layer of setting subtracts primarily to prevent in hot pressing material deformation
Few hot pressing die/foreign extrudes impression or pressure point to material, keeps the cleaning and flatness of material, high temperature resistant PE film is in warm
It is removed after the completion of pressure.
Preferably, the TPU layer is TPU membrane, and the hardness of the TPU membrane is 85A, with a thickness of 100 μm -150 μm.Thin
TPU former material cooperates its flexibility to facilitate cambered surface fitting；TPU substrate surface makees coatings simultaneously, and adhesion is more preferable, wear-resisting
Property it is high；The attribute of 85A causes material softness more preferable, and 100 μm -150 μm of material thickness is relatively thin, and property of hanging down is preferable, is easy fitting arc
Spend edge；And due to the self attributes of TPU material, on surface, painting reparation material adhesion is higher, not easily to fall off.
Preferably, the coatings are polyethylene terephthalate coating；The coatings with a thickness of
25μm；Reach certain selfreparing effect using the caoutchouc elasticity principle of the raw material, to increase the scratch resistance of protective film itself.
Preferably, described OCA layers is OCA layers of two-sided, and the viscosity of the OCA layers of two-sided is 200g；The OCA is two-sided
Glue-line is optics rank acrylic glue.
Preferably, described OCA layers with a thickness of 15-25 μm.OCA thickness can be reduced in 15 μm of -25 μm of reduction integral thickness
A rebound risk of the material after Hot-press cooling.
Preferably, the layer of silica gel with a thickness of 30 μm, viscosity 80-100g.Product can be improved in the collocation of the viscous silica gel of height
Final fitting stability；And silica gel good fluidity, it is easier to be vented.
Preferably, the pet layer be PET film, the pet layer with a thickness of 50 μm.Certain thickness PET is conducive to hot bending
Molding, can more preferably coincide curved surface, reduce the amplitude for rebound after cooling of being heated；50 μm of PET are in hot-forming degree, cooling rebound
It is all more balanced in terms of risk assessment.
A kind of preparation method for the protective film being bonded cambered surface edge, comprising the following steps:
1) select TPU membrane as TPU layer, polyethylene terephthalate raw material by the way of the coating of dimple anilox roll
Coatings are formed coated in TPU membrane upper surface；Obtain the first semi-finished product film；
2) select PET film as pet layer, coating silica gel forms layer of silica gel in the lower surface of PET film；In the upper table of PET film
Face paste covers the optics acrylic glue with biadhesive and forms OCA layers；By OCA layers of upper surface and step 1) obtained first
The lower surface TPU bonding in semi-finished product film, obtains the second semi-finished product film；
3) upper surface of reconditioning layer pastes the first PET release film in the second semi-finished product film that step 2) is obtained；First
The upper surface of PET release film pastes the first PE layers, and it is release that the layer of silica gel lower surface in the second semi-finished product film pastes the 2nd PET
Film pastes the 2nd PE layers in the lower surface of the 2nd PET release film, obtains prototype protective film；The first PET release film, second
PET release film is PET film；Described first PE layers, the 2nd PE layers be PE film；
4) hot bending shape is carried out to the prototype protective film that is obtained step 3) using mold: the mold include male mould and
The prototype protective film that step 3) is obtained is fixed on master tooling by master tooling, carries out being preheated to prototype protective film to master tooling
Temperature is 260-380 DEG C, keeps 5-15s；The temperature of male mould is preheated to 70 DEG C -85 DEG C；The bending angle of the mold compares institute
The matched small 13-15 degree of curve screens bending angle；The impression gap of male mould and master tooling is 250 μm -450 μm；Male mould,
Tool plugs heat conducting pipe in master mold；
5) male mould after preheating is pressed to master tooling is fitted into mold, and constant temperature keeps 3-12s；Backward male mould, mother
The heat conducting pipe circulation of mold is passed through cooling solution, keeps 3-10min；Mold is opened after cooling, the protective film after obtaining hot bending；Institute
The temperature for stating coolant liquid is -10 DEG C to 0 DEG C；
6) cambered surface edge can be bonded by carrying out cutting acquisition to the protective film after the resulting hot bending of step 5) according to required size
Protective film.
In the preparation method, mold is prepared using S136 steel, and the bending angle of grinding tool is less than the matched screen of institute
The bending angle of curtain, the setting are to be mainly used for offsetting hot pressing by groping to obtain repeatedly according to the property of raw material of protective film
The bending angle of protective film rebounds afterwards；It is possible thereby to provide a kind of protective film for being bonded edge.
Detailed description of the invention
Fig. 1 is the cross-sectional view of the protective film.
Wherein, the 1, the first PE layers；2, the first PET release film layer；3, coatings；4, TPU layer；5, OCA layers；6,PET
Layer；7, layer of silica gel；8, the 2nd PET release film layer；9, the 2nd PE layers
Specific embodiment
In the following, being described further in conjunction with attached drawing and specific embodiment to the present invention:
Embodiment 1:
As shown in Figure 1, a kind of protective film that can be bonded cambered surface edge, the protective film is layer structure, including successively layer
Folded first PE layers, the first PET release film layer, coatings, TPU layer, OCA layers, pet layer, layer of silica gel, the 2nd PET it is release
Film layer, the 2nd PE layers.The TPU layer is TPU membrane, and the hardness of the TPU membrane is 85A, with a thickness of 100 μm.It is described to review one's lessons by oneself overcoating
Layer is polyethylene terephthalate coating；The coatings with a thickness of 25 μm.Described OCA layers is OCA layers of two-sided,
The viscosity of the OCA layers of two-sided is 200g；The OCA layers of two-sided is optics rank acrylic glue.OCA layers of the thickness
It is 15 μm.The layer of silica gel with a thickness of 30 μm, viscosity 80g.The pet layer be PET film, the pet layer with a thickness of 50 μ
m。
The preparation method of the protective film for being bonded cambered surface edge, comprising the following steps:
1) select TPU membrane as TPU layer, polyethylene terephthalate raw material by the way of the coating of dimple anilox roll
Coatings are formed coated in TPU membrane upper surface；Obtain the first semi-finished product film；
2) select PET film as pet layer, coating silica gel forms layer of silica gel in the lower surface of PET film；In the upper table of PET film
Face paste covers the optics acrylic glue with biadhesive and forms OCA layers；By OCA layers of upper surface and step 1) obtained first
The lower surface TPU bonding in semi-finished product film, obtains the second semi-finished product film；
3) upper surface of reconditioning layer pastes the first PET release film in the second semi-finished product film that step 2) is obtained；First
The upper surface of PET release film pastes the first PE layers, and it is release that the layer of silica gel lower surface in the second semi-finished product film pastes the 2nd PET
Film pastes the 2nd PE layers in the lower surface of the 2nd PET release film, obtains prototype protective film；The first PET release film, second
PET release film is PET film；Described first PE layers, the 2nd PE layers be PE film；
4) hot bending shape is carried out to the prototype protective film that is obtained step 3) using mold: the mold include male mould and
The prototype protective film that step 3) is obtained is fixed on master tooling by master tooling, carries out being preheated to prototype protective film to master tooling
Temperature is 260 DEG C, keeps 5s；The temperature of male mould is preheated to 70 DEG C；The bending angle of mold Curved screen more matched than institute
The curtain small 13-15 degree of bending angle；The impression gap of male mould and master tooling is 250 μm μm；Tool, which plugs, in male mould, master mold leads
Heat pipe；
5) male mould after preheating is pressed to master tooling is fitted into mold, and constant temperature keeps 3s；Backward male mould, master tooling
Heat conducting pipe circulation be passed through cooling solution, keep 3min；Mold is opened after cooling, the protective film after obtaining hot bending；The cooling
The temperature of liquid is -10 DEG C；
6) cambered surface edge can be bonded by carrying out cutting acquisition to the protective film after the resulting hot bending of step 5) according to required size
Protective film.
Embodiment 2:
As shown in Figure 1, a kind of protective film that can be bonded cambered surface edge, the protective film is layer structure, including successively layer
Folded first PE layers, the first PET release film layer, coatings, TPU layer, OCA layers, pet layer, layer of silica gel, the 2nd PET it is release
Film layer, the 2nd PE layers.The TPU layer is TPU membrane, and the hardness of the TPU membrane is 85A, with a thickness of 120 μm μm.The selfreparing
Coating is polyethylene terephthalate coating；The coatings with a thickness of 25 μm.Described OCA layers is OCA double-sided adhesive
Layer, the viscosity of the OCA layers of two-sided are 200g；The OCA layers of two-sided is optics rank acrylic glue.Described OCA layers
With a thickness of 20 μm.The layer of silica gel with a thickness of 30 μm, viscosity 90g.The pet layer is PET film, the thickness of the pet layer
It is 50 μm.
The preparation method of the protective film for being bonded cambered surface edge, comprising the following steps:
1) select TPU membrane as TPU layer, polyethylene terephthalate raw material by the way of the coating of dimple anilox roll
Coatings are formed coated in TPU membrane upper surface；Obtain the first semi-finished product film；
2) select PET film as pet layer, coating silica gel forms layer of silica gel in the lower surface of PET film；In the upper table of PET film
Face paste covers the optics acrylic glue with biadhesive and forms OCA layers；By OCA layers of upper surface and step 1) obtained first
The lower surface TPU bonding in semi-finished product film, obtains the second semi-finished product film；
3) upper surface of reconditioning layer pastes the first PET release film in the second semi-finished product film that step 2) is obtained；First
The upper surface of PET release film pastes the first PE layers, and it is release that the layer of silica gel lower surface in the second semi-finished product film pastes the 2nd PET
Film pastes the 2nd PE layers in the lower surface of the 2nd PET release film, obtains prototype protective film；The first PET release film, second
PET release film is PET film；Described first PE layers, the 2nd PE layers be PE film；
4) hot bending shape is carried out to the prototype protective film that is obtained step 3) using mold: the mold include male mould and
The prototype protective film that step 3) is obtained is fixed on master tooling by master tooling, carries out being preheated to prototype protective film to master tooling
Temperature is 310 DEG C, keeps 20s；The temperature of male mould is preheated to 80 DEG C；The bending angle of mold Curved screen more matched than institute
The curtain small 13-15 degree of bending angle；The impression gap of male mould and master tooling is 350 μm；Tool plugs thermally conductive in male mould, master mold
Pipe；
5) male mould after preheating is pressed to master tooling is fitted into mold, and constant temperature keeps 7s；Backward male mould, master tooling
Heat conducting pipe circulation be passed through cooling solution, keep 6min；Mold is opened after cooling, the protective film after obtaining hot bending；The cooling
The temperature of liquid is -5 DEG C；
6) cambered surface edge can be bonded by carrying out cutting acquisition to the protective film after the resulting hot bending of step 5) according to required size
Protective film.
Embodiment 3:
As shown in Figure 1, a kind of protective film that can be bonded cambered surface edge, the protective film is layer structure, including successively layer
Folded first PE layers, the first PET release film layer, coatings, TPU layer, OCA layers, pet layer, layer of silica gel, the 2nd PET it is release
Film layer, the 2nd PE layers.The TPU layer is TPU membrane, and the hardness of the TPU membrane is 85A, with a thickness of 150 μm.It is described to review one's lessons by oneself overcoating
Layer is polyethylene terephthalate coating；The coatings with a thickness of 25 μm.Described OCA layers is OCA layers of two-sided,
The viscosity of the OCA layers of two-sided is 200g；The OCA layers of two-sided is optics rank acrylic glue.OCA layers of the thickness
It is 25 μm.The layer of silica gel with a thickness of 30 μm, viscosity 100g.The pet layer be PET film, the pet layer with a thickness of 50
μm。
The preparation method of the protective film for being bonded cambered surface edge, comprising the following steps:
1) select TPU membrane as TPU layer, polyethylene terephthalate raw material by the way of the coating of dimple anilox roll
Coatings are formed coated in TPU membrane upper surface；Obtain the first semi-finished product film；
2) select PET film as pet layer, coating silica gel forms layer of silica gel in the lower surface of PET film；In the upper table of PET film
Face paste covers the optics acrylic glue with biadhesive and forms OCA layers；By OCA layers of upper surface and step 1) obtained first
The lower surface TPU bonding in semi-finished product film, obtains the second semi-finished product film；
3) upper surface of reconditioning layer pastes the first PET release film in the second semi-finished product film that step 2) is obtained；First
The upper surface of PET release film pastes the first PE layers, and it is release that the layer of silica gel lower surface in the second semi-finished product film pastes the 2nd PET
Film pastes the 2nd PE layers in the lower surface of the 2nd PET release film, obtains prototype protective film；The first PET release film, second
PET release film is PET film；Described first PE layers, the 2nd PE layers be PE film；
4) hot bending shape is carried out to the prototype protective film that is obtained step 3) using mold: the mold include male mould and
The prototype protective film that step 3) is obtained is fixed on master tooling by master tooling, carries out being preheated to prototype protective film to master tooling
Temperature is 380 DEG C, keeps 15s；The temperature of male mould is preheated to 85 DEG C；The bending angle of mold Curved screen more matched than institute
The curtain small 13-15 degree of bending angle；The impression gap of male mould and master tooling is 450 μm；Tool plugs thermally conductive in male mould, master mold
Pipe；
5) male mould after preheating is pressed to master tooling is fitted into mold, and constant temperature keeps 12s；Backward male mould, master mold
The heat conducting pipe circulation of tool is passed through cooling solution, keeps 10min；Mold is opened after cooling, the protective film after obtaining hot bending；It is described cold
But the temperature of liquid is 0 DEG C；
6) cambered surface edge can be bonded by carrying out cutting acquisition to the protective film after the resulting hot bending of step 5) according to required size
Protective film.
Comparative example 1
A kind of hot bending screen protecting film, including stack gradually from top to bottom the first PE layers, the first PET release film layer, from
Repair layer, pet layer, layer of silica gel, the 2nd PET release film layer, the 2nd PE layers；This comparative example be mainly characterized by using pet layer as
Basal layer is coated with the reconditioning layer of 25 μ m-thicks.It prepares material used in the protective film of this comparative example and method is same as Example 2.
Comparative example 2
A kind of hot bending screen protecting film, including stack gradually from top to bottom the first PE layers, the first PET release film layer, from
Repair layer, TPU layer, layer of silica gel, the 2nd PET release film layer, the 2nd PE layers；This comparative example is mainly characterized by using pure TPU material
Layer based on material, and 25 μm of reparations are coated on its surface；Prepare material used in the protective film of this comparative example and method
It is same as Example 2.
Verify embodiment
Multinomial performance detection is carried out to embodiment 1-3 and comparative example 1,2, it is specific to be reviewed one's lessons by oneself to be detected using cross-cut tester test
The adhesive force of cladding；Pass through the scratch of reconditioning layer according to detection molding situation can be bonded by the matched screen of fitting institute
Repair time detects repairing effect, and after fitting matches screen for 24 hours, whether observation protection film edge tilts rebound detection and be bonded rebound
Effect.Detection was met as shown in table 1 below.The scheme of testing result display comparative example 1 is since PET film surface smoothness is high, certainly
Reparation adhesion is low, is carried out in hundred lattice friction testing of rubber with cross-cut tester, reconditioning layer falls off seriously；Reparation simultaneously
Edge is more easy to fall off under Frotteurism, and overall stability is poor；For comparative example 2 since material is pure TPU, mouldability is poor, rebound
Situation is obvious, influences pad pasting convenience, causes pad pasting contraposition not accurate.
The testing result of table 1, screen protecting film
For those skilled in the art, it can make other each according to the above description of the technical scheme and ideas
Kind is corresponding to be changed and deforms, and all these change and deform the protection model that all should belong to the claims in the present invention
Within enclosing.
Claims (9)
1. one kind can be bonded the protective film at cambered surface edge, the protective film is layer structure, it is characterised in that including stacking gradually
The first PET release film layer, coatings, TPU layer, OCA layers, pet layer, layer of silica gel, the 2nd PET release film layer；
The protective film for being bonded cambered surface edge prepares gained by following preparation method, specifically includes the following steps:
1) select TPU film as TPU layers, polyethylene terephthalate raw material by the way of the coating of dimple anilox roll
Coatings are formed coated in TPU film upper surface；Obtain the first semi-finished product film；
2) select PET film as PET layers, coating silica gel forms layer of silica gel in the lower surface of PET film；In PET film
Upper surface pastes the optics acrylic glue with biadhesive and forms OCA layers；OCA layers of upper surface is obtained with step 1)
The lower surface TPU bonding in the first semi-finished product film obtained, obtains the second semi-finished product film；
3) upper surface of reconditioning layer pastes the first PET release film in the second semi-finished product film that step 2 is obtained；First
The upper surface of PET release film pastes the first PE layers, and the layer of silica gel lower surface in the second semi-finished product film pastes the 2nd PET
Release film pastes the 2nd PE layers in the lower surface of the 2nd PET release film, obtains prototype protective film；First PET from
Type film, the 2nd PET release film are PET film；Described first PE layers, the 2nd PE layers be PE film；
4) carry out hot bending shape to the prototype protective film for being obtained step 3) using mold: the mold includes male mould and mother
Mold, the prototype protective film that step 3) is obtained is fixed on master tooling, and the temperature for being preheated to prototype protective film is carried out to master tooling
Degree is 260-380 DEG C, keeps 5-15 s；The temperature of male mould is preheated to 70 DEG C -85 DEG C；The bending angle ratio of the mold
Institute
The matched small 13-15 degree of curve screens bending angle；The impression gap of male mould and master tooling is 250 μm -450 μm；
Tool plugs heat conducting pipe in male mould, master mold；
5) male mould after preheating is pressed to master tooling is fitted into mold, the backward male mould of constant temperature holding, master tooling it is thermally conductive
Pipe circulation is passed through cooling solution, and mold is opened after keeping cooling, the protective film after obtaining hot bending；The temperature of the coolant liquid be-
10 DEG C to 0 DEG C；
6) guarantor that cutting acquisition can be bonded cambered surface edge is carried out to the protective film after the resulting hot bending of step 5) according to required size
Cuticula.
2. the protective film according to claim 1 for being bonded cambered surface edge, it is characterised in that: the first PET release film
Layer is far from being also covered with the first PE layers in the one side of coatings.
3. the protective film according to claim 2 for being bonded cambered surface edge, it is characterised in that: the 2nd PET release film
Layer is far from being also covered with the 2nd PE layers in the one side of layer of silica gel.
4. the protective film according to claim 1 for being bonded cambered surface edge, it is characterised in that: the TPU layer is TPU membrane,
The hardness of the TPU membrane is 85A, with a thickness of 100 μm -150 μm.
5. the protective film according to claim 1 for being bonded cambered surface edge, it is characterised in that: the coatings are poly-
Ethylene terephthalate coating；The coatings with a thickness of 25 μm.
6. the protective film according to claim 1 for being bonded cambered surface edge, it is characterised in that: described OCA layers two-sided for OCA
Glue-line；The OCA layers of two-sided is optics rank acrylic glue.
7. the protective film according to claim 6 for being bonded cambered surface edge, it is characterised in that: described OCA layers with a thickness of
15-25μm。
8. the protective film according to claim 1 for being bonded cambered surface edge, it is characterised in that: the layer of silica gel with a thickness of
30 μm。
9. the protective film according to claim 1 for being bonded cambered surface edge, it is characterised in that: the pet layer is PET film,
The pet layer with a thickness of 50 μm.
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| CN109054675A (en) * | 2018-07-24 | 2018-12-21 | 深圳市键键通科技有限公司 | A kind of electronic equipment film and preparation method thereof |
| CN108822758A (en) * | 2018-07-27 | 2018-11-16 | 程强 | A kind of Mobile phone film and preparation method thereof |
| CN110202901A (en) * | 2019-05-28 | 2019-09-06 | 深圳华硕新材料应用科技有限公司 | The TPU screen protector and preparation method thereof of unlocked by fingerprint under light sensation screen |
| TWI806267B (en) | 2020-12-07 | 2023-06-21 | 美商聖高拜塑膠製品公司 | Composite film and methods of forming a composite film |
| CN113667422A (en) * | 2021-08-31 | 2021-11-19 | 太湖金张科技股份有限公司 | Coating preparation method for improving glue overflow performance of AB double-sided adhesive tape |
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